[PATCH] s390: export ipl device parameters
Sysfs interface to export ipl device parameters. Dependent on the ipl type
the interface will look like this:
- ccw ipl:
/sys/firmware/ipl/device
/ipl_type
- fcp ipl:
/sys/firmware/ipl/binary_parameter
/bootprog
/br_lba
/device
/ipl_type
/lun
/scp_data
/wwpn
- otherwise (unknown that is):
/sys/firmware/ipl/ipl_type
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-s390/setup.h b/include/asm-s390/setup.h
index 0d51c48..348a881 100644
--- a/include/asm-s390/setup.h
+++ b/include/asm-s390/setup.h
@@ -8,11 +8,14 @@
#ifndef _ASM_S390_SETUP_H
#define _ASM_S390_SETUP_H
+#include <asm/types.h>
+
#define PARMAREA 0x10400
#define COMMAND_LINE_SIZE 896
#define RAMDISK_ORIGIN 0x800000
#define RAMDISK_SIZE 0x800000
#define MEMORY_CHUNKS 16 /* max 0x7fff */
+#define IPL_PARMBLOCK_ORIGIN 0x2000
#ifndef __ASSEMBLY__
@@ -64,6 +67,53 @@
#define SET_CONSOLE_3215 do { console_mode = 2; } while (0)
#define SET_CONSOLE_3270 do { console_mode = 3; } while (0)
+struct ipl_list_header {
+ u32 length;
+ u8 reserved[3];
+ u8 version;
+} __attribute__((packed));
+
+struct ipl_block_fcp {
+ u32 length;
+ u8 pbt;
+ u8 reserved1[322-1];
+ u16 devno;
+ u8 reserved2[4];
+ u64 wwpn;
+ u64 lun;
+ u32 bootprog;
+ u8 reserved3[12];
+ u64 br_lba;
+ u32 scp_data_len;
+ u8 reserved4[260];
+ u8 scp_data[];
+} __attribute__((packed));
+
+struct ipl_parameter_block {
+ union {
+ u32 length;
+ struct ipl_list_header header;
+ } hdr;
+ struct ipl_block_fcp fcp;
+} __attribute__((packed));
+
+#define IPL_MAX_SUPPORTED_VERSION (0)
+
+#define IPL_TYPE_FCP (0)
+
+/*
+ * IPL validity flags and parameters as detected in head.S
+ */
+extern u32 ipl_parameter_flags;
+extern u16 ipl_devno;
+
+#define IPL_DEVNO_VALID (ipl_parameter_flags & 1)
+#define IPL_PARMBLOCK_VALID (ipl_parameter_flags & 2)
+
+#define IPL_PARMBLOCK_START ((struct ipl_parameter_block *) \
+ IPL_PARMBLOCK_ORIGIN)
+#define IPL_PARMBLOCK_SIZE (IPL_PARMBLOCK_START->hdr.length)
+
#else
#ifndef __s390x__
